leetcode

Daily Problem and 1 Random Problem

3 files changed, 38 insertions(+), 0 deletions(-)

diff --git a/ Problems/1903.cpp b/ Problems/1903.cpp

@@ -0,0 +1,9 @@

class Solution {

public:

string largestOddNumber(const string &num) const {

for (int i = num.size() - 1; i >= 0; i--) {

if ((num[i] & 0x1F) % 2) return num.substr(0, i + 1);

}

return "";

}

};

diff --git a/ Problems/2423.cpp b/ Problems/2423.cpp

@@ -0,0 +1,27 @@

class Solution {

int count[27] = {};

bool check(int crnt, int goal) {

for (int j = 1; j <= 26; j++) {

if (crnt == j || !count[j]) continue;

if (goal == -1)

goal = count[j];

else if (count[j] != goal)

return false;

}

return true;

}

public:

bool equalFrequency(const string &word) {

for (const char c : word)

count[c & 0x1F]++;

for (int i = 1; i <= 26; i++) {

if (!count[i]) continue;

const int goal = count[i] > 1 ? count[i] - 1 : -1;

if (check(i, goal)) return true;

}

return false;

}

};

diff --git a/ README.md b/ README.md

@@ -800,6 +800,7 @@ for solving problems. | 1884 | Medium | [Egg Drop With 2 Eggs and N Floors](Problems/1884.cpp) | | 1887 | Medium | [Reduction Operations to Make the Array Elements Equal](Problems/1887.cpp) | | 1899 | Medium | [Merge Triplets to Form Target Triplet](Problems/1899.cpp) |

| 1903 | Easy | [Largest Odd Number in String](Problems/1903.cpp) |

| 1905 | Medium | [Count Sub Islands](Problems/1905.cpp) | | 1910 | Medium | [Remove All Occurrences of a Substring](Problems/1910.cpp) | | 1921 | Medium | [Eliminate Maximum Number of Monsters](Problems/1921.cpp) |

@@ -901,6 +902,7 @@ for solving problems. | 2410 | Medium | [Maximum Matching of Players With Trainers](Problems/2410.cpp) | | 2415 | Medium | [Reverse Odd Levels of Binary Tree](Problems/2415.cpp) | | 2421 | Medium | [Number of Good Paths](Problems/2421.cpp) |

| 2423 | Easy | [Remove Letter To Equalize Frequency](Problems/2423.cpp) |

| 2428 | Medium | [Maximum Sum of an Hourglass](Problems/2428.cpp) | | 2433 | Medium | [Find The Original Array of Prefix Xor](Problems/2433.cpp) | | 2439 | Medium | [Minimize Maximum of Array](Problems/2439.cpp) |